Can we have a mission about that?
Harec helping Hans in whatever he needs to do.
I believe it is more to show that the Raiders are people with lives that continue on the Broken Planet outside of the missions. Hans has been fucked up by life more than once. The last fucking left him dishonored and without a home.
He is an old dog, he doesn't learn new tricks. Likely the only reason he is at Shamash's Chapel with the rest of the Raiders is because he needed a quick place to hide from enemy factions, not because he intended to wage a war with Harec. Harec's quick dismissal of Hans' abrupt declaration suggests that Harec and Hans have already discussed his leaving.
Probably Harec isn't thrilled about a human leaving with knowledge of his hideout and years ago would have killed Hans right then and there. Hans really has no allies left and Harec would know this, so they both know they will deal with each other in the future.
As such, I don't think a mission showing Hans vainly trying to find some shelter only to be turned-out by enemy factions would be very fun. Certainly it would be insightful, but I don't think it would matter very much. We can easily assume that he failed and returned to Harec's side.